68 lines
1.6 KiB
TypeScript
68 lines
1.6 KiB
TypeScript
//// [genericObjectSpreadResultInSwitch.ts]
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type Params = {
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foo: string;
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} & ({ tag: 'a'; type: number } | { tag: 'b'; type: string });
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const getType = <P extends Params>(params: P) => {
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const {
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// Omit
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foo,
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...rest
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} = params;
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return rest;
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};
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declare const params: Params;
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switch (params.tag) {
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case 'a': {
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// TS 4.2: number
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// TS 4.3: string | number
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const result = getType(params).type;
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break;
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}
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case 'b': {
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// TS 4.2: string
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// TS 4.3: string | number
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const result = getType(params).type;
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break;
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}
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}
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//// [genericObjectSpreadResultInSwitch.js]
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var __rest = (this && this.__rest) || function (s, e) {
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var t = {};
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for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
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t[p] = s[p];
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if (s != null && typeof Object.getOwnPropertySymbols === "function")
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for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
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if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
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t[p[i]] = s[p[i]];
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}
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return t;
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};
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var getType = function (params) {
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var
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// Omit
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foo = params.foo, rest = __rest(params, ["foo"]);
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return rest;
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};
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switch (params.tag) {
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case 'a': {
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// TS 4.2: number
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// TS 4.3: string | number
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var result = getType(params).type;
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break;
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}
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case 'b': {
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// TS 4.2: string
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// TS 4.3: string | number
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var result = getType(params).type;
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break;
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}
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}
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